The 1980s MBz 300TD. I owned one in college thru grad school. Drove it from 106,000 to 186,000. I only made 2 repairs: replaced was a transmission linkage bolt for about $10, and the motor mounts. The motor mounts ran me $800. The next weekend my friend borrowed the car and totaled it. You know how long $800 takes to pay off when you are only eating ramen noodles and rice most nights because you had so little money in grad school?
Oh, this one is nice.
Mercedes Benz 300 Series Turbo Diesel | eBay
Honda, Toyota, Hyundai, Nissan - sorry just bad taste in my mouth from these cars in the 1980s.
Subaru - hmm, that is an interesting idea. I like the look of the outback. Is the interior up to Audi standards?
MBz - Someone at work recommended the MB CLA wagon, but I have heard a lot of bad things about this car. My parents have an E-Class wagon and never had any problems with it.